High Density Polyethylene - HDPE
The dense arrangement of the monomers makes the plastic extremely strong and resistant, even stiff. This material is used for bottles and their caps, buckets, and also toys.

Medium Density Polyethylene - MDPE
This material has a high resistance to aggressive materials and chemicals and products made of this material are easy to clean. For this reason, this plastic is often used for tanks and containers.

Low Density Polyethylene - LDPE
It's low density makes this polyethylene highly flexible and elastic. These characteristics mean that the material has many uses, such as for foil, sachets, carrier bags and awnings: it is also used for insulating cables and for a variety of household goods and toys.

Linear Low Density Polyethylene - LLDPE
The differences between this material and LDPE are only very minor ones. Their uses are also almost identical. But LLDPE is a mixture of polyethylene with a copolymer.